By this way you can give directions to your textures on organic models and can experience more effects by changing contrast, scale and adding new effects . It really works on my most personal work.

Below you can find my textures that was prepared for head.

Glossy reflection map is bloody important for most cases cos if the face doesn't glare in some parts it will look like a dead. You can see the highlight on Laetitia Casta's eye and observe the life that it gives to her face.